Drilling tool for drain hole of steam turbine partition plate

Abstract

The utility model relates to a steam turbine partition plate drain hole drilling tool which comprises a supporting seat, a supporting frame is arranged on the upper surface of the supporting seat, a lifting seat is arranged on the supporting frame, the lifting seat is connected with a lifting mechanism, a rotating disc is arranged on the side wall of the lifting seat, the rotating disc is in rotating fit with the lifting seat, and the rotating disc is connected with an angle locking mechanism. And a drilling machine is fixedly arranged on the side wall of the rotating disc. Compared with a steam turbine partition plate, the drilling tool is smaller in size and weight and convenient to move, the position of the drilling tool can be rapidly adjusted, and machining efficiency is guaranteed; and meanwhile, the height and angle of the drilling machine can be adjusted, and the machining precision can be guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of drilling equipment, and in particular to a drilling tool for drainage holes in steam turbine diaphragms. Background Technology

[0002] The turbine diaphragm is cylindrical in shape. During production, several drainage holes need to be drilled on its outer circumference. Some of these drainage holes are angled, meaning their axial direction deviates from the radial direction of the turbine diaphragm. Manual drilling is unstable and makes it difficult to precisely control the drilling angle. Therefore, it is usually necessary to mill or drill the turbine diaphragm before drilling. Due to the weight and size of the turbine diaphragm, milling or drilling on both sides is difficult, affecting production efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a drilling tool for the drainage holes of steam turbine diaphragms, which eliminates the need for milling machines or drilling machines, improves efficiency, and can accurately control the drilling angle.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: a drilling tool for steam turbine diaphragm drainage holes, including a support base, a support frame provided on the upper surface of the support base, a lifting base provided on the support frame, a lifting mechanism connected to the lifting base, and a turntable provided on the side wall of the lifting base. The turntable rotates with the lifting base, and an angle locking mechanism is connected to the turntable; a drilling machine is fixedly provided on the side wall of the turntable.

[0005] Furthermore, the drilling machine is a magnetic drill.

[0006] Furthermore, the side wall of the lifting seat away from the turntable is provided with a first annular guide groove, and the side wall of the lifting seat facing the turntable is provided with a second annular guide groove. The bottom of the second guide groove is connected to the bottom of the first guide groove, and the width of the second guide groove is smaller than that of the first guide groove. The side wall of the turntable is provided with an annular guide rail. The cross-section of the guide rail is T-shaped, and the guide rail slides in cooperation with the first guide groove and the second guide groove.

[0007] Furthermore, the guide rail is mounted to the side wall of the turntable by connecting screws.

[0008] Furthermore, the lifting mechanism includes a vertical lead screw connected to a power mechanism for driving the lead screw to rotate; the support frame is provided with a vertical strip-shaped guide hole, the lifting seat and the lead screw are respectively located on both sides of the strip-shaped guide hole, a transmission block is fixedly provided on the lifting seat, the transmission block passes through the strip-shaped guide hole and is threadedly engaged with the lead screw, the transmission block is slidably engaged with the inner wall of the strip-shaped guide hole, and the lifting seat is slidably engaged with the side wall of the support frame.

[0009] Furthermore, the angle locking mechanism consists of multiple locking screws, which pass through the lifting seat and are threadedly connected to it, with the ends of the locking screws pressing against the turntable.

[0010] Furthermore, the power mechanism is a rotary handle.

[0011] Furthermore, the support frame and support base form a right-angled trapezoid.

[0012] Furthermore, a set of pads is provided on the lower surface of the support base.

[0013] The beneficial effects of this utility model are as follows: When drilling holes in a turbine partition, the turbine partition is placed on a horizontal supporting plane, and the drilling tool of this utility model is moved to a suitable position on the supporting plane, with the drilling machine on the drilling tool close to the turbine partition. Then, the turntable is rotated according to the axial angle of the drain hole, causing the turntable to rotate and making the axial direction of the drill bit parallel to the axial direction of the drain hole. Next, according to the height of the drain hole, the height of the lifting seat and the drilling machine is adjusted using a lifting mechanism to match the height of the drill bit. After adjustment, the axial direction of the drill bit is consistent with the axial direction of the drain hole to be processed, and the turbine partition can then be drilled using the drilling machine.

[0014] The drilling tool of this invention is smaller and lighter than the turbine partition, and is easy to move. The position of the drilling tool can be quickly adjusted to ensure processing efficiency. At the same time, the height and angle of the drilling machine can be adjusted to ensure processing accuracy. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the present invention;

[0016] Figure 2 yes Figure 1 Schematic diagram of the cross section of AA;

[0017] Figure 3 yes Figure 1 Enlarged schematic diagram of part B in the middle;

[0018] Reference numerals: 1—Support base; 2—Support frame; 3—Lifting base; 4—Turntable; 5—Angle locking mechanism; 6—Drilling machine; 7—First guide groove; 8—Second guide groove; 9—Guide rail; 10—Connecting screw; 11—Lead screw; 12—Strip guide through hole; 13—Transmission block; 14—Power mechanism; 15—Padded block. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] This utility model relates to a drilling tool for drainage holes in steam turbine diaphragms, such as... Figure 1 , Figure 2 and Figure 3 As shown, the support includes a support base 1, which can be made of a horizontal rectangular metal plate. A set of pads 15 are provided on the lower surface of the support base 1. The pads 15 can be welded to the support base 1 or installed on the lower surface of the support base 1 with bolts. The pads 15 are used to support the support base 1, so that the support base 1 is at a suitable height.

[0021] A support frame 2 is provided on the upper surface of the support base 1. The support frame 2 can adopt various suitable frame structures. In order to simplify the structure of the support frame 2 while ensuring its strength, the support frame 2 and the support base 1 of this utility model form a right trapezoid. That is, the support frame 2 includes a vertical plate, a horizontal top plate and an inclined side plate. The lower ends of the vertical plate and the side plate are welded to the two ends of the support base 1, and the upper ends of the vertical plate and the side plate are welded to the two ends of the top plate.

[0022] A lifting seat 3 is mounted on the support frame 2. The lifting seat 3 can be rectangular or disc-shaped. A lifting mechanism is connected to the lifting seat 3, which can move the lifting seat 3 up and down, thereby adjusting its height. A turntable 4 is mounted on the side wall of the lifting seat 3. The turntable 4 is a disc, vertically positioned (i.e., its center line is horizontal). The turntable 4 rotates in conjunction with the lifting seat 3, and is connected to an angle locking mechanism 5. The angle locking mechanism 5 locks the turntable 4 after it has rotated to a suitable angle, preventing further rotation. A drilling machine 6 is fixedly mounted on the side wall of the turntable 4. The drilling machine 6 can be bolted to the side wall of the turntable 4 or welded to it. Existing small drilling machines, such as magnetic drills, can be used for the drilling machine 6.

[0023] In the process of using this utility model of a drilling tool for turbine diaphragm drainage holes: The drilling tool and the turbine diaphragm are placed on the same horizontal support plane, with the drilling machine 6 close to the outer wall of the turbine diaphragm. Next, the turntable 4 is rotated according to the axial direction of the drainage hole. The turntable 4 drives the drilling machine 6 to rotate as a whole. The drill bit angle of the drilling machine 6 is adjusted so that the drill bit axis is parallel to the axis of the drainage hole to be processed. Then, the angle locking mechanism 5 is used to lock the turntable 4 to prevent it from rotating automatically, thus keeping the drill bit angle of the drilling machine 6 fixed. Next, according to the height of the drainage hole, the lifting mechanism is used to adjust the height of the lifting seat 3 and the drilling machine 6 so that the drill bit height of the drilling machine 6 matches the height of the drainage hole. After adjustment, the drill bit axis of the drilling machine 6 is consistent with the axis of the drainage hole to be processed, and the drilling machine 6 can then be used to drill holes in the turbine diaphragm. To facilitate quick adjustment of the height of the drilling machine 6, the location where drilling is required can be marked on the outer wall of the turbine diaphragm.

[0024] A first annular guide groove 7 is provided on the side wall of the lifting seat 3 away from the turntable 4. The first guide groove 7 has a rectangular cross-section. A second annular guide groove 8 is provided on the side wall of the lifting seat 3 facing the turntable 4. The second guide groove 8 has a rectangular cross-section, and its bottom is connected to the bottom of the first guide groove 7. The width of the second guide groove 8 is smaller than that of the first guide groove 7, making the overall cross-section of the first guide groove 7 and the second guide groove 8 T-shaped. A circular guide rail 9 is provided on the side wall of the turntable 4. The guide rail 9 has a T-shaped cross-section and includes a wide annular guide ring and a narrow annular guide ring. The width of the wide guide ring matches the width of the first guide groove 7, and the size of the narrow guide ring matches the size of the second guide groove 8. The guide rail 9 is located within the first guide groove 7 and the second guide groove 8 and slides in cooperation with them.

[0025] The guide rail 9 is detachably connected to the turntable 4. During assembly, the turntable 4 is first placed against the side wall of the lifting seat 3, then the guide rail 9 is placed into the first guide groove 7, and the narrow guide ring of the guide rail 9 is pushed into the second guide groove 8. The narrow guide ring is then connected to the turntable 4. The guide rail 9 is mounted to the side wall of the turntable 4 using connecting screws 10. Specifically, multiple smooth through holes can be provided on the guide rail 9, and multiple threaded holes can be provided on the side wall of the turntable 4. The connecting screws 10 are passed through the through holes and connected to the threaded holes, thus connecting the guide rail 9 and the turntable 4 as one unit.

[0026] After the turntable 4 and the lifting base 3 are coupled in the above manner, the angle locking mechanism 5 can be achieved using multiple locking screws. The locking screws pass through the lifting base 3 and are threadedly connected to it, with the ends of the locking screws pressing against the turntable 4. To lock the turntable 4, rotate the locking screws; the small end of the screw extends out of the lifting base 3 and presses against the turntable 4, thus maintaining its stability. To release the turntable 4, rotate the locking screws so that the small end returns to the interior of the lifting base 3.

[0027] The lifting mechanism can use common power equipment such as linear motors. To simplify the structure, reduce the weight of the entire drilling tool, and lower costs, the lifting mechanism of this utility model includes a vertical lead screw 11. The upper end of the lead screw 11 is mounted on the top plate of the support frame 2 via a bearing, and the lower end of the lead screw 11 is mounted on the support base 1 via a bearing. The lead screw 11 is connected to a power mechanism 14 that drives the lead screw 11 to rotate. The support frame 2 is provided with a vertical strip-shaped guide hole 12. The lifting base 3 and the lead screw 11 are respectively located on both sides of the strip-shaped guide hole 12. A transmission block 13 is fixedly installed on the lifting base 3. The transmission block 13 passes through the strip-shaped guide hole 12 and is threadedly engaged with the lead screw 11. The transmission block 13 is slidably engaged with the inner wall of the strip-shaped guide hole 12, and the lifting base 3 is slidably engaged with the side wall of the support frame 2.

[0028] When the power mechanism 14 drives the lead screw 11 to rotate, the transmission block 13 is threadedly engaged with the lead screw 11. Because the transmission block 13 is located within the strip-shaped guide hole 12, it cannot rotate with the lead screw 11. However, under the action of the thread, the transmission block 13 will move linearly along the strip-shaped guide hole 12, i.e., move up and down, thereby driving the lifting seat 3 to move up and down, adjusting the height of the lifting seat 3 and the drilling machine 6. The power mechanism 14 is a rotary handle, which is manually operated, saving on power components such as motors and reducing costs.

[0029] The lifting seat 3 slides against the side wall of the support frame 2. To improve the stability of the lifting seat 3, the contact area between the lifting seat 3 and the support frame 2 is relatively large. In this case, the locking screw, which serves as the angle locking mechanism 5, can first penetrate the side wall of the support frame 2 and then engage with the lifting seat 3 via a thread. To accommodate the lifting movement of the lifting seat 3, a strip-shaped notch can be provided on the side wall of the support frame 2 for the locking screw to pass through. The length of the strip-shaped notch is vertical, the width is slightly larger than the diameter of the locking screw, and the depth is consistent with the thickness of the side wall of the support frame 2. The locking screw is located within the strip-shaped notch and can rise and fall synchronously with the lifting seat 3.

[0030] This utility model is relatively lightweight and can be easily moved to the vicinity of the outside of the turbine diaphragm. During the entire drilling process, there is no need to move the turbine diaphragm, resulting in high drilling efficiency and meeting the required drilling accuracy.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drilling tool for drainage holes in a steam turbine diaphragm, characterized in that: Includes a support base (1), a support frame (2) is provided on the upper surface of the support base (1), a lifting seat (3) is provided on the support frame (2), the lifting seat (3) is connected to a lifting mechanism, and a turntable (4) is provided on the side wall of the lifting seat (3). The turntable (4) rotates with the lifting seat (3), and an angle locking mechanism (5) is connected to the turntable (4). A drilling machine (6) is fixedly provided on the side wall of the turntable (4).

2. The drilling tool for turbine diaphragm drainage holes as described in claim 1, characterized in that: The drilling machine (6) is a magnetic drill.

3. The drilling tool for drain holes in turbine diaphragms as described in claim 1, characterized in that: The lifting seat (3) has a first annular guide groove (7) on its side wall away from the turntable (4), and a second annular guide groove (8) on its side wall facing the turntable (4). The bottom of the second guide groove (8) is connected to the bottom of the first guide groove (7), and the width of the second guide groove (8) is smaller than that of the first guide groove (7). The turntable (4) has a side wall with an annular guide rail (9). The cross-section of the guide rail (9) is T-shaped, and the guide rail (9) slides in cooperation with the first guide groove (7) and the second guide groove (8).

4. The drilling tool for drain holes in turbine diaphragms as described in claim 3, characterized in that: The guide rail (9) is mounted on the side wall of the turntable (4) by connecting screws (10).

5. The drilling tool for drain holes in turbine diaphragms as described in claim 1, characterized in that: The lifting mechanism includes a vertical lead screw (11), which is connected to a power mechanism (14) that drives the lead screw (11) to rotate; the support frame (2) is provided with a vertical strip-shaped guide hole (12), the lifting seat (3) and the lead screw (11) are respectively located on both sides of the strip-shaped guide hole (12), the lifting seat (3) is fixedly provided with a transmission block (13), the transmission block (13) passes through the strip-shaped guide hole (12) and is threadedly engaged with the lead screw (11), the transmission block (13) is slidably engaged with the inner wall of the strip-shaped guide hole (12), and the lifting seat (3) is slidably engaged with the side wall of the support frame (2).

6. The drilling tool for drain holes in turbine diaphragms as described in claim 5, characterized in that: The angle locking mechanism (5) consists of multiple locking screws. The locking screws pass through the lifting seat (3) and are threadedly connected to the lifting seat (3), and the ends of the locking screws press against the turntable (4).

7. The drilling tool for drain holes in turbine diaphragms as described in claim 5, characterized in that: The power mechanism (14) is a rotary handle.

8. The drilling tool for drain holes in turbine diaphragms as described in claim 1, characterized in that: The support frame (2) and the support base (1) form a right trapezoid.

9. The drilling tool for drain holes in turbine diaphragms as described in claim 1, characterized in that: A set of pads (15) is provided on the lower surface of the support base (1).

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